CN101140246A - X-ray CT test system and CTmethod for testing objects - Google Patents
X-ray CT test system and CTmethod for testing objects Download PDFInfo
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- CN101140246A CN101140246A CNA200710146020XA CN200710146020A CN101140246A CN 101140246 A CN101140246 A CN 101140246A CN A200710146020X A CNA200710146020X A CN A200710146020XA CN 200710146020 A CN200710146020 A CN 200710146020A CN 101140246 A CN101140246 A CN 101140246A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/40—Imaging
- G01N2223/419—Imaging computed tomograph
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Abstract
The present invention relates to a X ray CT examining device which is provided with a X ray tube with focus and an examining carriage that is used for accommodating the object to be checked, the X ray tube generates fan beam or conical beam, the beam totally irradiate the detector which is separated from the focus for a certain distance, the examining carriage is provided with a rotary rotation axis which is perpendicular to the plane of the fan beam or perpendicular to the central axis of the conical beam. According to the invention an examining carriage which can be fixed to at least one measuring point is arranged, wherein each checking point is arranged with the mode that the rotation axis lies in the measuring line which comes out from the focus and is clamped for a slope angle to the fan beam of the conical beam. Besides, the invention also relates to a CT method for examining the object, especially the object with different dimension with the X ray CT examining device of the invention.
Description
Technical field
The present invention relates to a kind of X ray CT checkout facility, this X ray CT checkout facility has the X-ray tube of band focus and is used to hold the inspection balladeur train (Pruefschlitten) of examine object, this X-ray tube produces fan beam or cone beam, the beam irradiation limits the detector of distance apart from focus, and check that balladeur train has the rotatable rotary axis, this rotation is perpendicular to the plane of fan beam or perpendicular to the central axis of cone beam.In addition, the invention still further relates to a kind of CT method that is used for checking the object of object, especially different sizes by above-mentioned X ray CT checkout facility.
Background technology
Two kinds of inspection methods commonly used in industrial computer tomography X ray photography (CT).A kind of method relates to translation-rotation-tomography (second generation) and another kind of method relates to fan beam-tomography (third generation).In both cases, before focal spot, focus, x-ray source, the fan beam diminuendo, fan beam illuminates a dimension detector fully.X-ray source and detector all are provided with on stationkeeping ground.Between them, the examine object is introduced in the fan beam, and the examine object is wound the axis rotation perpendicular to the plane of fan beam, so that can carry out the reconstruct of object.Distance between X-ray tube and the detector is variable, and the position that is arranged on the object on the rotating disk equally also is variable, makes that how much amplifications can be consistent with corresponding requirement.The single flat seam of object is taken as follows, and promptly object or X-ray tube and detector progressively change their height.Replace the use of fan beam, also may use the cone beam, and this beam is projected on the two-dimensional detector.Therefore, (according to the size of object) can save scanning successively.
In fan beam-tomography, produce complete measurement data record by this way: check that object is in the fan beam fully in section, and take at least 180 ° of projections in the subtended angle that adds fan beam.This method is fast, yet the fan-shaped size of beam has determined to install at this full-size of the object of interrupting layer photography.This size is also referred to as measures circle.This relation also is suitable for conversely, and promptly for can the bigger object of tomography, measuring circle must be bigger, so use the fan beam with bigger subtended angle and therefore use bigger detector.In the method, smaller object has required big equipment, and this equipment has long detector and big distance between focus and detector.At this, cause technical restriction by the maximum emission angle of radiation source and the structure size of detector, wherein maximum emission angle has limited subtended angle.
When fan beam does not cover whole object, then can widen this fan beam synthetically by the sideway movement of radiation source and detector or object selectively.At this, relate to translation-rotation-tomography.Certainly, must hocket linear and rotatablely move at this, this is consuming time, and transverse movement is also required linear axis, and this linear axis must be on entire path guarantees that with high precision rotation aim at the right angle on fan beam plane.
If replace the bidimensional fan beam to use three-dimensional cone beam, then in the focus of x-ray source and have usually between the angle of two dimensional surface detector of corner angle or between the edge contour of the focus of x-ray source and employed image picking-up apparatus, open available inspection volume (Pruefvolumen).In others, above-mentioned explanation is suitable for similarly.
Under the situation of the typical sizes distribution of checking object and distributed number, (often there are a plurality of little and a small amount of big objects), need such design review (check) (DR) equipment up to now, make and to check big object in all cases.Be created in the structure size aspect and the shortcoming aspect attainable Measuring Time of whole checkout facility thus.
Summary of the invention
Task of the present invention provide a kind of compare with traditional structure mechanically simplify, compact and X ray CT checkout facility fast, this equipment is used for the inspection of big or small visibly different object.To this, also should provide a kind of method, such X ray CT checkout facility utilizes this method work.
This task solves by the X ray CT checkout facility with the described feature of claim 1.Owing to check that balladeur train can be fixed on the measurement point that is on the slotted line, so provided the simple physical construction of this device.With compare by equipment according to the prior art of translation-rotation-tomography and fan beam-tomography, aiming at one by slotted line passes focus and has the straight line at pitch angle, the examine object that can have size given in advance by the unit check of constructing forr a short time with respect to the central axis of X ray.This point is following obtaining: the distance between in the edge beam of fan beam and the slotted line is all the time greater than the distance from central axis to the respective edges beam.Possible according to the present invention is that a unique measurement point only is provided.By such mode, obtain the very simple mechanical realization of this device.Yet, equally also possiblely according to the present invention be, a full range of measurement points are provided, measure balladeur train and can be fixed in these measurement points.By such mode, realized a kind of checkout facility flexibly, utilize this checkout facility also can simply and apace check the object that varies in size with very simple mode and method.
Preferably, the central axis of fan beam or cone beam and the pitch angle between the slotted line are between 5 ° to 40 °.By such mode, the obvious expansion of the size of measuring object is provided under the situation of same structure height, or under the situation of object size given in advance, can have reduced the structure height of X ray CT checkout facility.The pitch angle particularly preferably is 15 °.
A kind of particularly preferred form of implementation of the present invention is that slotted line is perpendicular to detector surface.In such structure, need in the measurement data that is obtained, not carry out geometry correction, because occur being out of shape owing to the geometry of equipment.In addition, like this be provided with and realize very simply.
The favourable improvement project of another kind of the present invention is that detector links to each other with driver element and can move in detector plane in the plane of fan beam or under the situation of cone beam perpendicular to slotted line.Possible by this way is, designs dummy detector with the expense on simple and mechanical, and this detector is bigger than the detector of necessary being.Preferably, central axis intersects with synthetic (virtual) detector center.Different with the expansion of traditional measurement circle (traditional measurement circle expansion is by the synthetic detector size given in advance regularly in a plurality of fixing positions) can nondestructively be utilized the whole length of detector by moving freely of detector and nondestructively utilize the whole of the data that measure thus at this.
The preferred improvement project of another kind of the present invention is, the central axis of fan beam or cone beam is perpendicular to the surface of detector, yet slotted line is not orthogonal to the surface of detector.Also obtained such advantage (described above) by such mode, promptly under the structure size of equipment situation given in advance, can check bigger object, perhaps under the situation big or small given in advance of object, can reduce structure size because measurement point apart from the distance of one of them edge beam greater than the distance apart from this edge beam from central axis.Under these circumstances, although under the situation of the emission angle that utilizes X-ray tube fully, guaranteed maximum line length, however the necessary geometry correction of considering the data of acquisition.
The favourable improvement project of another kind of the present invention is, checks that balladeur train is fixed on the measurement point on the slotted line serially.Obtain continuously changing the possibility of amplification by this way.In addition, also allow the big bandwidth (Bandbreite) of object size, these objects can both be checked in an orderly manner.
The favourable improvement project of another kind of the present invention is to realize by guide rail on the slotted line entity that the inspection balladeur train can move on guide rail.Thus, obtain very simple mechanical realization, this mechanical realization allows to check the very accurate localization of balladeur train simultaneously, and allows the very accurate localization of rotation thus.At this, on the one hand possible is, check balladeur train continuously (promptly on each position of checking line) be fixed on and (promptly be used to check the object of size given in advance) on a series of particular locations or also can only be fixed on a unique position.
The favourable improvement project of another kind of the present invention is to provide in any measurement point and check that balladeur train rotates freely with being fixed on the object of checking the examine on the balladeur train.By such mode, when checking object, under any circumstance all obtain all information required to the CT method.
The favourable improvement project of another kind of the present invention is that under the situation of object rotation, in an edge beam, this edge beam is from focus and be mapped to the detector edge all the time for this object in any measurement point.By such mode, guaranteed to obtain all equally to checking required object data, and do not needed mobile detector or make rotation motion perpendicular to slotted line.
In addition, this task also solves by the CT method with the described feature of claim 11.Because the rotation of the inspection balladeur train that is used for locating in fan beam spatially is provided with near focus ground, wherein object never can crossed two edge beams when rotation rotates, so X ray according to the present invention-illustrated advantage of CT-equipment is achieved above: promptly such possibility, littler detector and the X ray CT checkout facility of constructing forr a short time that obtains thus can be used in the inspection of the object with size given in advance.This causes the saving of expense with respect to known X ray CT method.At least also can use the fan-shaped method of favourable part (if object is not fully in the beam window) with above-mentioned advantage always.In addition, rotation only needs on its position that is positioned in order to check object as far as possible accurately the plane perpendicular to fan beam.In the application's scope, the fan-shaped method of part is interpreted as a kind of method, this method is different from half detector method (in half detector method, data by opposite side generate half complete information), only the zone of Que Dinging produces with being synthesized, and so the zone in the middle part of being positioned at is measured by " overlappingly ": can realize more favourable signal to noise ratio (S/N ratio) by data computing.Therefore when only carrying out high-precision analysis be in the centre of image, this be interesting (center of image is not necessarily must be the center of parts).
In addition, this task also solves by a kind of CT method with the described feature of claim 12.Because its size is depended in the location of object, so can locate the first little object like this, makes it fully by the fan beam transmission, this has caused checking very fast of the first little object.In addition, can be positioned near detector by the second bigger object of fan beam transmission fully, and implement fan beam-tomography.This also is a kind of than the obvious method more fast of translation-rotation-tomography.In addition, medium sized object can be selectively with little amplification (promptly near detector) complete fan-shaped in and be examined apace thus, perhaps in fan-shaped method of part or half fan-shaped method slightly lentamente but be examined in the mode of bigger amplification.According to the present invention, only must guarantee such position rotating axis under the situation of the second bigger object, make that measuring circle never protrudes in two edge beams.
A kind of favourable improvement project of the present invention is that the first object distance focus is arranged on so far and is used on the slotted line checking, makes it just not cross fan beam or conical surface beam in whole inspection.By this way, may utilize fan beam-tomography that the first little object of size maximum is carried out tomography.
The favourable improvement project of another kind of the present invention is that second pair of image distance focus is arranged on so far and is used on the slotted line checking, makes it just not cross two edge beams in whole inspection.Possible by this way is can carry out tomography to the second big as far as possible object by fan beam-tomography.
The favourable improvement project of another kind of the present invention is that detector moves to its another extreme position or moves to its a plurality of other extreme positions from the one extreme position during measuring by driver element.Set forth like that at device as top, compared, realized synthesizing of bigger detector by such mode with the detector of necessary being.By such mode, under the constant situation of the structure size of holding device, can check bigger inspection object, perhaps under the situation of object size given in advance, can reduce structure size.
Description of drawings
Set forth other advantage of the present invention and details with reference to following illustrated embodiment shown in the drawings.Wherein:
Fig. 1 shows the schematic plan according to first embodiment of X ray CT checkout facility of the present invention, wherein checks the surface of line perpendicular to detector, and
Fig. 2 shows the schematic plan according to second embodiment of X ray CT checkout facility of the present invention, and wherein the central axis of X ray is perpendicular to the surface of detector.
Embodiment
Below with regard to these two embodiment, be starting point from there being fan beam 3.Certainly, these embodiment also are suitable for the cone beam similarly, this can comprehend for technicians immediately, because this technician understands the different geometries of this device in principle, and can easily transfer to the cone beam from the form of implementation with fan beam 3 according to the present invention.
In Fig. 1, schematically shown the vertical view of X ray CT checkout facility.X-ray tube 1 has focus 2, and the X ray beam comes out from this focus with the form of fan beam 3.This fan beam 3 is mapped to detector 4, and this detector is shone by fan beam 3 fully.Being arranged in the industry CT like this is fully known.Distance between detector 4 and the focus 2 can change, so that realize the perspective geometry relation as well as possible to the examine object.Owing to only can carry out tomography, so not only X-ray tube 1 but also detector 4 can move on its height for the thin slice of examine object in fan beam 3 planes by fan beam 3.At this, layer by layer the examine object is had an X-rayed.Alternatively also possible is that this object changes on its height or two kinds of method combinations.
Be provided with the balladeur train (not shown) between focus 2 and detector 4, the object (not shown) of examine can be fixed on the balladeur train.Check balladeur train around rotation 5 rotations, this rotation is perpendicular to the plane of fan beam 3.By such mode, the data recording of formation object under different exposure pathways.Carry out the reconstruct of examine object then according to these data recording.Relate to nondestructive analysis at this, perhaps relate to determining of geometric properties for the error in the examine object (such as Gaussian error).
The object that varies in size has the measurement circle 12,13 of different sizes.Measure circle 12,13 and determine according to the shape of object and the position of rotation 5 on the one hand, wherein object is during checking around this rotation rotation.At this, the ultimate range that the radius of measuring circle 12,13 is had apart from rotation 5 corresponding to the arbitrfary point of object.Under the situation of " rotational symmetric " wheel,, wheel checks on the balladeur train that make when its central point overlaps with rotation 5, this distance is corresponding to the radius of wheel when being installed in this wise.
Possible so far is that by fan beam-tomography method inspection object, the measurement circle 12 of these objects is fully in fan beam 3.By such mode, produced very big restriction, because can only take these objects, because they must be provided with near detector 4 with very little amplification to the object of maximum possible.On the contrary, to the more small object with littler measurement circle 12 possible be these objects of location, central axis 6 range finders, 4 bigger distance ground in the fan beam 3.
Justify 13 object for tomography has bigger measurement, need to use above-mentioned translation-rotation-tomography so far, this need realize in consuming time and technical more complicated mode.Another kind of possibility for so big object is to use the fan-shaped method of part.
Now, the invention discloses such possibility, promptly in same X ray CT checkout facility, not only implement fan beam-tomography, and implement the fan-shaped method of part.By such mode possible be, according to the size of object, and measure the size of circle 12,13 thus according to it, determine suitable method respectively individually.
In order to realize measuring as far as possible fast, under the situation of small object, implement fan beam-tomography usually with complete first measurement circle 12 in fan beam 3.Yet, under situation, when the geometric projection precondition can be modified, also can implement the fan-shaped method of part under the application corresponding situation greater than such object with first measurement circle 12.This is drawn by following: in the fan-shaped method of part, the object with measurement circle 12,13 given in advance can more close focus 2 be provided with, and however still realizes perspective reliably.
With respect to central axis 6 inclination inclined angle alpha, slotted line 9 (or its virtual prolongation) does not meet with detector 4 centers by slotted line 9.This means, and when central axis 6 extends, compare, only can implement fan beam-tomography littler object when slotted line 9.In Fig. 1, this becomes obviously in the following manner, promptly shows two measurement points 15 to the first big object of measuring circle 12 such as having.In left measurement point 15, rotation 5 is so near focus 2, and making wins measures circle 12 also not exclusively in fan beam 3.Therefore, on this measurement point 15, having only by object is possible around the fan-shaped method of part of rotation 5 rotations 10.In contrast, on right measurement point 15, to same measurement circle 12, this measurement circle is covered by fan beam 3 fully.Therefore, can implement fan beam-tomography at this.This fan beam-tomography is more quick, yet the amplification in left measurement point 15 is bigger, can select corresponding required method like this.
To having the object of the second bigger measurement circle 13, the fan-shaped method of applying portion.At this, select measurement point 15 in this wise, make it around rotation 5 rotation 10 o'clock, reach almost surface near detector 4.By such mode, make full use of second of maximum possible and measure circle 13.
Each is measured circle 12,13, remove the free rotatability essential with respect to detector 4 (and measurement point 15 apart from enough distances of detector) thus, also essential is, measures to justify not protrude in two edge beams 7,8.Otherwise can not the fan-shaped method of applying portion, and measurement point 15 is moved perpendicular to slotted line 9 (according to translation-rotation-tomography).Yet this can cause the great extra cost mechanically of this device.
Therefore be well suited in same device, checking the objects (these objects even can change very significantly aspect big or small at it) of different sizes according to the device according to the present invention among Fig. 1.During measuring process, any different big or small objects are not needed linear movement, and only be around rotation 5 rotations 10.Greatly saved the time by this way.
The simplification of this mechanical hook-up provides by such mode, promptly carry out object respectively and take on the measurement point on the slotted line 9 15, and balladeur train is with only one degree of freedom motion.Therefore, do not need linear scan axis.By the position of the rotation on the slotted line 95, projection relation is optimised aspect resolution.Therefore, especially possible is, not only (represented) under the little amplification situation as measuring in the location right of circle 12 first and also under big amplification situation (first shown in the on the left side measured and justified in 12) according to the fan-shaped method of part medium sized object is carried out tomography.
When this equipment will be checked identical all the time object given in advance, can distribute according to the size distribution and the frequency of these objects, be displaced sideways (this is displaced sideways owing to obtaining with respect to central axis 6 inclination inclined angle alpha) optimization in the length that makes detector 4 aspect image field size and the Measuring Time and its.Because slotted line 9 does not need the geometry correction of road wheel exterior feature with respect to the perpendicular alignmnet of detector 4.
Device according to the present invention also can be constructed in " reduction version " in this wise, only make can be on the discrete measurement point 15 on the slotted line 9 of virtual presence fixing rotation 5.Therefore, check that balladeur train is impossible along the mobile of this virtual measurement line 9.By this way, realized more simple mechanical device and therefore reach lower expense.
Other form of implementation according to X ray CT checkout facility of the present invention shown in Fig. 2 is very similarly constructed with the form of implementation shown in Fig. 1 in principle.Therefore only introduce difference below in more detail with first embodiment of Fig. 1.Identical or act on identical part and indicate same reference marker.
Main difference point between first embodiment of Fig. 1 and second embodiment of Fig. 2 is, the central axis 6 of fan beam 3 is perpendicular to the surface of detector 4, and no longer is slotted line 9.By the inclined angle alpha that also provides, slotted line 9 tilts with respect to central axis 6, thus when checking in the data of resulting object, obtain the relevant correction of angle of the road wheel exterior feature of the detector 4 that tilts at the surface here.
The inclined angle alpha source is then gone up and can be selected arbitrarily, and wherein size distribution and the frequency according to the examine object distributes, and in conjunction with the size of detector and the size of the distance between focus 2 and the detector 4, calculates optimum incline angle α.By the inclined angle alpha of such selection, can carry out the optimization of image field size and Measuring Time.
Three different measurement points 15 have been described altogether in the embodiment of Fig. 2, wherein have the first very little measurement circle 12 in left measurement point 15, this measurement circle in fan beam 3, makes it possible to carry out fan beam-tomography fully.Second measures circle 13 significantly measures circle 12 greater than first, and can not be positioned on the slotted line 9 on the position that can be covered fully by fan beam 3.Therefore, this measurement circle is positioned as close to detector 4, and this must implement part fan-shaped-tomography.Having the medium sized the 3rd, to measure the 3rd measurement point 15 of circle 14 just in time big like this, make (under the situation of range finder 4 enough distances) its not only in the first edge beam 7, and in the second edge beam 8.Thus, can implement fan beam-tomography to its (as measuring circle 12) to second.
In this device, also only carry out along the continuous motion of the one degree of freedom of slotted line 9, in discrete measurement point 15, only may be fixed on the measurement point.Therefore do not need the linear sweep axle and provided simplification in mechanical form of implementation.The optimization of the projection relation in this device aspect resolution (as mentioned above) also is possible, make and not only can in whole fan beam 3, carry out tomography under the situation of little amplification, and can carry out tomography by the fan-shaped method of part to small object with big amplification to small object.
In a word, in form of implementation, under the situation of the emission angle that makes full use of X-ray tube 1, obtain having the geometric relationship of the optimization of maximum line length, yet wherein need geometry correction according to Fig. 2.
At last, realized following advantage: about the accessible measurement circle 12,13,14 of maximum, can reduce the length of detector 4, reduce the cost of device thus by two embodiment.In addition, not only can reduce the distance (this causes the shortening of Measuring Time) between focus 2 and the detector 4, and can realize the reducing of physical dimension (reduction that this causes equipment cost) of equipment.Because the small construction size also can reduce the radiation proof housing, has saved cost thus again.
The reference marker table
1 X-ray tube
2 focuses
3 fan beams
4 detectors
5 rotations
6 central axis
7 first edge beams
8 second edge beams
9 slotted lines
10 rotations
The edge of 11 detectors
12 first measure circle
13 second measure circle
14 the 3rd measure circle
15 measurement points
The α pitch angle
Claims (15)
1. X ray CT checkout facility, has the band focus, (2) X-ray tube, (1) and be used to hold the inspection balladeur train of examine object, wherein said X-ray tube produces fan beam, (3) or the cone beam, described beam illuminates fully apart from described focus, (2) detector of preset distance, (4), described inspection balladeur train has the rotatable rotary axis, (5), described rotation, (5) perpendicular to described fan beam, (3) plane or perpendicular to the central axis of described cone beam, (6), it is characterized in that
Described inspection balladeur train can be fixed at least one measurement point (15), wherein each in these measurement points (15) is arranged so that described rotation (5) is positioned on the slotted line (9), described slotted line from described focus (2) come out and with the central axis (6) of described fan beam (3) or cone beam folder one pitch angle (α).
2. X ray CT checkout facility according to claim 1 is characterized in that, described pitch angle (α) especially is 15 ° between 5 ° to 40 °.
3. each described X ray CT checkout facility in requiring according to aforesaid right is characterized in that described slotted line is perpendicular to the surface of described detector (4).
4. X ray CT checkout facility according to claim 3, it is characterized in that, described detector (4) links to each other with driver element, and can be perpendicular to described slotted line (9) in the plane of described fan beam (3) or mobile in the plane of described detector (4) under the situation of described cone beam.
5. X ray CT checkout facility according to claim 4 is characterized in that, described central axis (6) meets with synthetic detector center, and described synthetic detector is by obtaining based on the extreme position of its motion.
6. according to claim 1 or 2 described X ray CT checkout facilities, it is characterized in that the central axis (6) of described fan beam (3) or cone beam is perpendicular to the surface of described detector (4).
7. each described X ray CT checkout facility in requiring according to aforesaid right is characterized in that, described inspection balladeur train is fixed on the measurement point (15) on the described slotted line (9) serially.
8. each described X ray CT checkout facility in requiring according to aforesaid right is characterized in that realize by guide rail on described slotted line (9) entity, described inspection balladeur train can move on described guide rail.
9. each described X ray CT checkout facility in requiring according to aforesaid right is characterized in that in each measurement point (15), described inspection balladeur train can rotate freely (10) with examine object fixed thereon.
10. each described X ray CT checkout facility in requiring according to aforesaid right, it is characterized in that, when measurement point (15) is when object rotation (10) arbitrarily, described object is all the time at an edge beam (7,8) in, described edge beam comes out and meets with the edge (11) of described detector (4) from described focus (2).
11. one kind is used for by the CT method of checking object according to each described X ray CT checkout facility of aforesaid right requirement, wherein said object is after the location, rotate around the rotation of described inspection balladeur train (5) for inspection, it is characterized in that, in described fan beam (3), carry out the location of described inspection balladeur train on described slotted line (9), make described object when described rotation (5) rotates from being no more than two edge beams (7,8).
12. CT method that is used for the object that each described X ray CT checkout facility inspection varies in size by claim 1 to 10, it is characterized in that, its size is depended in the location of described object, and described object rotates around the rotation of described inspection balladeur train (5) for inspection after the location, wherein said rotation (5) is as close as possible described focus (2) location under the situation of first object, and the size of described first object is little of making it comprised by described fan beam (3) or cone beam fully when described rotation (5) rotates; Under the situation of the second bigger object, the as close as possible described detector of described rotation (5) (4) location, wherein said rotation (5) is selected greatly to making described second object when described rotation (5) rotates apart from the distance of described focus (2), never can cross two edge beams (7,8).
13. CT method according to claim 12, it is characterized in that, first object is arranged on away from described focus (2) and is used on the slotted line (9) checking, makes described first object just not cross described fan beam (3) or described cone beam in whole inspection.
14. according to each described CT method in claim 12 or 13, it is characterized in that, second object is arranged on away from described focus (2) and is used on the slotted line (9) checking, makes described second object not cross two edge beams (7,8) in whole inspection.
15. according to each described CT method in the claim 11 to 14, it is characterized in that, described detector (4) moves to its another extreme position from an one extreme position by described driver element during measuring, or moves to its a plurality of other extreme positions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006041850.6 | 2006-09-06 | ||
| DE102006041850A DE102006041850B4 (en) | 2006-09-06 | 2006-09-06 | CT method for checking objects of different sizes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101140246A true CN101140246A (en) | 2008-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710146020XA Pending CN101140246A (en) | 2006-09-06 | 2007-09-05 | X-ray CT test system and CTmethod for testing objects |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20080089466A1 (en) |
| EP (1) | EP1898208A1 (en) |
| JP (1) | JP2008064758A (en) |
| CN (1) | CN101140246A (en) |
| DE (1) | DE102006041850B4 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101892A (en) * | 2014-07-09 | 2014-10-15 | 中国计量科学研究院 | X-ray and guide rail parallel system |
| CN105319227A (en) * | 2015-12-01 | 2016-02-10 | 兰州三磊电子有限公司 | Detection method for X ray of boiler tube panel |
| CN105445300A (en) * | 2015-12-16 | 2016-03-30 | 天津三英精密仪器有限公司 | Full-field rod-shaped sample CT scanning device |
| CN110400389A (en) * | 2018-04-24 | 2019-11-01 | 依科视朗国际有限公司 | Obtain the method for important feature and the method to its component classification in same type component |
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| KR101217212B1 (en) * | 2011-11-10 | 2012-12-31 | 주식회사 나노포커스레이 | Computed tomography apparatus |
| US10031091B2 (en) * | 2016-07-27 | 2018-07-24 | Avonix Imaging, LLC | Shifting turn table for x-ray imaging manipulator |
| DE102019103382A1 (en) * | 2019-02-12 | 2020-08-13 | Yxlon International Gmbh | Method for the reconstruction of a digital representation of object features of an examination object in the spatial area of an X-ray system |
| US11016042B2 (en) | 2019-08-13 | 2021-05-25 | GE Sensing & Inspection Technologies, GmbH | Fast industrial computed tomography for large objects |
| EP4036612A1 (en) * | 2021-01-29 | 2022-08-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Ct system |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4422177A (en) * | 1982-06-16 | 1983-12-20 | American Science And Engineering, Inc. | CT Slice proximity rotary table and elevator for examining large objects |
| JPH0619337B2 (en) * | 1984-10-19 | 1994-03-16 | 株式会社東芝 | Tomography equipment |
| US5119408A (en) | 1990-10-31 | 1992-06-02 | General Electric Company | Rotate/rotate method and apparatus for computed tomography x-ray inspection of large objects |
| JP2589613B2 (en) | 1991-09-17 | 1997-03-12 | 株式会社日立製作所 | X-ray CT imaging method and X-ray CT apparatus |
| US5740224A (en) * | 1994-09-27 | 1998-04-14 | University Of Delaware | Cone beam synthetic arrays in three-dimensional computerized tomography |
| NL1011693C1 (en) * | 1999-03-29 | 2000-10-03 | Skyscan B V B A | Microtomography method for obtaining image of internal structure inside objects, involves rotating object to ensure each part is scanned |
| JP2002204796A (en) * | 2001-01-11 | 2002-07-23 | Hitachi Medical Corp | Three-dimensional x-ray ct equipment |
| JP3993483B2 (en) * | 2002-07-11 | 2007-10-17 | 東芝Ｉｔコントロールシステム株式会社 | Computed tomography equipment |
| JP2005006772A (en) * | 2003-06-17 | 2005-01-13 | Ge Medical Systems Global Technology Co Llc | X-ray diagnostic equipment and ct image forming method |
| JP4504743B2 (en) * | 2004-06-17 | 2010-07-14 | 東芝Ｉｔコントロールシステム株式会社 | Computed tomography equipment |
| JP2004301861A (en) * | 2004-07-29 | 2004-10-28 | Toshiba It & Control Systems Corp | Computer tomographic apparatus |
| JP4569763B2 (en) * | 2005-04-19 | 2010-10-27 | 株式会社島津製作所 | X-ray CT system |
| DE102005036527B4 (en) * | 2005-08-03 | 2008-05-21 | Yxlon International X-Ray Gmbh | X-ray CT test system and CT method for testing objects |
| CN100435733C (en) * | 2005-12-31 | 2008-11-26 | 清华大学 | X-CT scanning system |
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2007
- 2007-09-04 JP JP2007229230A patent/JP2008064758A/en active Pending
- 2007-09-05 EP EP07017405A patent/EP1898208A1/en not_active Ceased
- 2007-09-05 CN CNA200710146020XA patent/CN101140246A/en active Pending
- 2007-09-06 US US11/899,983 patent/US20080089466A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101892A (en) * | 2014-07-09 | 2014-10-15 | 中国计量科学研究院 | X-ray and guide rail parallel system |
| CN105319227A (en) * | 2015-12-01 | 2016-02-10 | 兰州三磊电子有限公司 | Detection method for X ray of boiler tube panel |
| CN105319227B (en) * | 2015-12-01 | 2021-09-03 | 兰州三磊电子有限公司 | Method for detecting X-ray of boiler tube panel |
| CN105445300A (en) * | 2015-12-16 | 2016-03-30 | 天津三英精密仪器有限公司 | Full-field rod-shaped sample CT scanning device |
| CN110400389A (en) * | 2018-04-24 | 2019-11-01 | 依科视朗国际有限公司 | Obtain the method for important feature and the method to its component classification in same type component |
| CN110400389B (en) * | 2018-04-24 | 2023-09-12 | 依科视朗国际有限公司 | Method for obtaining important characteristics in same type of component and method for classifying same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008064758A (en) | 2008-03-21 |
| DE102006041850B4 (en) | 2011-06-16 |
| DE102006041850A1 (en) | 2008-03-27 |
| EP1898208A1 (en) | 2008-03-12 |
| US20080089466A1 (en) | 2008-04-17 |
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